Snap fastener



March 11, 1924. 1,486,315

' VM R.VVH EY SNAP FASTENER Fi1ed.June 18, 1923 ATHMNEK Patented l dar. ll, l do latent;

ice.

WILLIAM R. WILEY, OF MOUNT CLEMENS, MICHIGAN.

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Application filed June 18, 1923. Serial No. 645,987.

To all whom it may concern:

Be it known that 1, WILLIAM R. WILEY, a citizen of the United States, residing at R. F. D. No. 4, Mount Clemens, county of Macomb, tate of Michigan, have invented a certain new and useful Improvement in Snap Fasteners, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to snap devices for automobile curtains and the like, and has for its object an improved organization of parts which combines unusual cheapness of manufacture with efiicient uniting action, except when the parts are intentionally actuated in just the relative direction intended, when their separation may be easily effected.

In the drawings:

Figures 1, 2 and 3 are views of the principal component parts of my improved construction.

Figure A is a large scale diagrammatic view of the parts of the snap catch in assembled form and with the unlocking positions of the parts shown in Figures 2 and 3 indicated in dotted lines.

Figure 5 is a sectional elevational View taken along the line 55 of Figure 4.

Figure 6 is a shaded perspective, differing only slightly from Figure A. designed to emphasize the relative positioning of the mushroomed edge of the head shown in Figure 2 and of the overturned edges of the stamping shown alone in Figure 3.

Figure 7 is a partly sectional elevational view of a pair of curtains carrying the snap button parts, showing an intermediate step in the attaching or detaching operation.

At B in Figure 1 is shown a form of disc or washer provided with a central upstanding stud C, which latter is adapted to engage through the aperture A in the mushroomed head A to secure the same on one surface of a fabric curtain, such as are commonly used for motor vehicle tops. If the mushroomed head A is designed to be positioned on a solid portion of the vehicle body, it may be held in place by means of a nail or screw passing through its aperture A. Such a disc or washer as B is similarly used to hold the stamping E, shown in Figure 8, in position on a second curtain section, whose detachable association with the curtain piece carrying the mushroomed head A may be desired, the edges of the disc B making it easy of seizure with ones fingers to start the detaching movement of the two parts. The mushroomed head A and stamping E thus supported on their respective curtain sections constitute the main cooperating parts which this disclosure concerns.

As brought out in Figures 3 and A the stamping E is in superficial extent perhaps one-third or a quarter short of being a complete circle, and its peripheral edges adja cent to the straight edge or squared side F are provided with underturned points or inward projections G, which are adapted to engage positively under the peripheral edge H of the stud A, as is also the inbent point J which is located on the peripheral curved edge of the stamping E opposite this straight edge F. The fit of these points under the mushroomed edge H is so accurate that a straight pull, such as would be exerted by the wind upon the curtains which are thus connected, would ordinarily fail of separating effect. If it is drawn down slightly, that is, in a plane parallel with that of the disc B to the dotted line position Z shown in Figure 4:, the lower edge of the stamping, carrying the inbent point J can then be swung away from the disc B, about the straight line joining the points G as an axis until the point J is clear of the mushroomed edge H as shown in Figure 7, after which a shght lifting movement of that part of the curtain which carries the stamping will suffice to clear the points G from the mush roomed edge H. Similarly, to lock the parts in place, the points G and the straight edge F are first slipped under the mushroomed edge H, and the stamping E as a whole then moved downwardly slightly relative to the plane of the disc B, until the underturned point J engages under the mushroomed edge H to a degree of interlocking similar to that of the points G.

What I claim is:

1. A snap catch, having, in combination with a mushroomed head, an overengaging snap shell therefor, consisting of an apertured stamping having a straight edge on one side and an otherwise circular underturned edge constituting the remainder of its periphery, the points of union of the two portions of the edge of the stamping being formed as looking points for engagement under the edge of themushroomed head, and that portion of the curved periphery of the stamping lying opposite its straight edge being provided with a similar locking point, said snap shell being adapted to be detached from engagement with said mushroomed head by being swung about the line joining said first named looking points as a center and being moved through a plane parallel with that of the mushroomed head.

2. The combination, with a mushroorned head having an underturned peripheral edge, of a centrally apertured stamping having a straight edge constituting a part of its otherwise circular periphe'ry,and a plurality of underturned points located at the'ends of said straight-edged portion and at that portion of the curved periphery substantially opposite thereto, said stamping being adapted to be moved through a plane substantially parallel to that of the mushroome'd head and thereafter swung to an oblique position with respect thereto about a line passing through the first named pair of points as an axis, to efiect disengagement of the third tongue on thestamping from the underturned edge of the mushroomed head.

3. In combination, with a generally convex head member having slightly underturned edges, a centrally apertured shell having a concaveexpose'd face the edge portions of which are provided with a plurality of in wardly' projecting bearing points, two of which are adapted to serve as bearing points about whose'axial line the shell is adapted to be rocked and'moved in a plane substantially parallel to that of the shell as a whole,

to eiiect the locking engagement of the oppositely disposed other bearing point under an oppositely disposed portion of the edge of the convex head member.

4. In a combination, with an entering member provided with an underturned peripheral edge, a complementary receiving shell 'WllOSG curved outwardly-turned edges are adapted to engage over said underturned peripheral edge ofthe entering member at a plurality ofindented points thereon, two of said points being "iecatsa'st the ends of a: straight-edged cut away portion, aboutwhich as an axis the remaining portion of the shell is adapted to be slightly rdckedto eiiect the engagement and disengagement of the 0p posit'ely positioned o'ther bearing point.

5. A; snap'fastener, having in combination a mushro'omedhe'ad piece, and a centrally anchoredshell piece adapted to'have op positely disposed bearing points1on its outwardly turned peripheral edge brought into anchoring engagement about the edge of said mushroomed "head, two of said bearing points serving asthe termini of an axis aboutwhich the body of said shell piece is rocked to asset the engagement or disengagement of the third bearing point withrespect to the edge 

